[gimp] authors.xml: add Klaus Staedtler in the list of contributor artists.

[Jehan Pagès <jehanp src gnome org>]

commit 5c0f4b5b9252725eb471cdb5d943543498378e8b
Author: Jehan <jehan girinstud io>
Date:   Sat Dec 26 17:38:58 2015 +0100

    authors.xml: add Klaus Staedtler in the list of contributor artists.

 authors.xml |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/authors.xml b/authors.xml
index 439065d..7d344b3 100644
--- a/authors.xml
+++ b/authors.xml
@@ -285,6 +285,7 @@
   <contributor role="author" last-active="2.4">Kevin Sookocheff</contributor>
   <contributor role="artist" last-active="2.4">Carol Spears</contributor>
   <contributor role="author" last-active="2.0">Adam Spiers</contributor>
+  <contributor role="artist" last-active="2.10">Klaus Staedtler</contributor>
   <contributor role="documenter" last-active="2.6">Patrycja Stawiarska</contributor>
   <contributor role="artist author" last-active="2.10">Jakub Steiner</contributor>
   <contributor role="author" last-active="2.8">Omari Stephens</contributor>